干旱区生态环境知识资源中心(Arid): 陆地棉萌发至三叶期不同生育阶段耐盐特性

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	陆地棉萌发至三叶期不同生育阶段耐盐特性
其他题名	The characters of salt-tolerance at different growth stages in cotton
	王俊娟; 王德龙; 樊伟莉; 宋贵方; 王帅; 叶武威
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:13 页码:3720-3727
中文摘要	土壤盐渍化是一个世界性的资源问题和生态问题,盐分胁迫几乎会影响棉花所有重要的生命活动,造成棉花的减产或其他不利影响。通过对14个棉花品种(系)的萌发期耐盐性、芽期耐盐性以及两个耐盐性不同的品种(系)三叶期的耐盐性,对棉花不同时期的耐盐特性进行了研究,结果表明:棉花在不同生育阶段耐盐能力是不同的,棉花盐敏感时期是在萌发出苗期。随着生育期的延长,棉花的耐盐性是逐步提高的,进行耐盐性鉴定的最佳时期在是萌发出苗期。在三叶期,随着盐分浓度的提高,棉花苗受伤害程度逐渐增加,盐敏感品种(系)受伤害大于耐盐品种,在同样盐浓度胁迫条件下,耐盐性不同的品种各部位受到的伤害不同,耐盐品种(系)中棉所35受伤害程度由高到低依次为:真叶>上胚轴>子叶;盐敏感品种(系)Tam cot CAB-CS受伤害程度由高到低依次为:真叶>子叶>上胚轴。
英文摘要	Soil salinity is a serious threat to cotton production worldwide,especially in arid and semi-arid regions.Excessive salts in the soil affect all most the whole living process of a cotton plant mainly through osmotic stress,iron toxity and nutrient imbalance,and finally leads to reduced cotton yield and fiber quality.Plant response to salinity stress may vary with genotypes and the growth stages in which the stress is imposed.However,it is still not clear if there exist difference in salt tolerance among current cotton cultivars at germination and seedling stages.The main objective of this study is to determine the salt tolerance of different types of cotton varieties.We attempted to develop easy and accurate methods for identifying cotton salt tolerance and screening genetic materials of cotton,with focus on difference in salt-tolerance of cotton between salt-tolerant cultivars and salt-sensitive cultivars at different stages during stand establishment.To achieve this objective,we conducted box and pot experiments at the Cotton Research Institute(CRI),Anyang,Henan province in 2009.Seeds of 14 cotton varieties(lines)(sGKzhong980,Lumianyan21,CRI35,Lumianyan16,CRI 45,Jimian668,DPlcon215,Handan109,Zhong404A,Yumian21,CRI12,Yinshuangjia,Zhong9806 and Line44)were grown in either a box for germination or in a pot containing saline soil for emergence.The germination rate and the leaf leakage solution electrical conductivity were determined.Two typical varieties(CRI35 and Tamcot CAB-CS)with different salt tolerance were also studied at three-leaf age stage.For the germination stage study,the cotton seeds were planted in the mixture of NaCl and sterilized sand,and incubated in a growth chamber.For the juvenile seedling stage study,the seedling germinated on wet double layers filter paper towel were transferred to the sterilized sand mixture which contained 0.4% NaCl(w/w),and incubated in a growth chamber.For the three-leaf stage,the seedlings were grown in the non-salt soil pots in a growth chamber and treated with different salinity level of stress when the seedlings reached tree leaf sage.The results showed that there were significant differences in salt tolerance among the 14 varieties treated at the germination stage,with the maximum relative germination rate of 88.6% and the minimum of 9.1%.The germination rate of most varieties treated with salt at the juvenile seedling stage showed less difference than those treated at the germination stage among the 14 varieties,most of their germination rate being higher than 50%.It indicated that seedlings were more sensitive in germination stage than in juvenile seedling stage.Once the seeds germinated the salt tolerance increased over the growing time.The most appropriate stage for assessment of cotton salt tolerance was from germination to seedling stage.Both varieties treated with salt at the three-leaf stage could survive under at least 0.55% NaCl,but their seedlings became shorter in length with smaller leaf and shorter epicotyl as the salt concentration increased.The two cultivars also differed significantly in response to salt stress.The sensitive variety was more severely inhibited than the tolerant one.The electrical conductance is an indicator of permeability of plant plasma membrane.Higher conductance shows the severer of intensity of membrane injury.The spatial sites of the two varieties response differed significantly.The salt injury intensity of different organs was different under the same salt concentration.For the salt-tolerant variety CRI35,the intensity of plasma membrane injury from high to low was true leaf > epicotyl >cotyledon.For salt-sensitive variety Tamcot CAB-CS,the intensity of injury was true leaf >cotyledon>epicotyl.
中文关键词	陆地棉 ; 生育阶段 ; 耐盐性
英文关键词	cotton different growth stages salt-tolerance
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4310951
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226940
作者单位	中国农业科学院棉花研究所, 农业部棉花遗传改良重点实验室, 安阳, 河南 455000, 中国
推荐引用方式 GB/T 7714	王俊娟,王德龙,樊伟莉,等. 陆地棉萌发至三叶期不同生育阶段耐盐特性[J],2011,31(13):3720-3727.
APA	王俊娟,王德龙,樊伟莉,宋贵方,王帅,&叶武威.(2011).陆地棉萌发至三叶期不同生育阶段耐盐特性.生态学报,31(13),3720-3727.
MLA	王俊娟,et al."陆地棉萌发至三叶期不同生育阶段耐盐特性".生态学报 31.13(2011):3720-3727.